CN103795277A - Power supply with output protection function and control method thereof - Google Patents
Power supply with output protection function and control method thereof Download PDFInfo
- Publication number
- CN103795277A CN103795277A CN201210425374.9A CN201210425374A CN103795277A CN 103795277 A CN103795277 A CN 103795277A CN 201210425374 A CN201210425374 A CN 201210425374A CN 103795277 A CN103795277 A CN 103795277A
- Authority
- CN
- China
- Prior art keywords
- output
- value
- protection
- power supply
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention provides a power supply with an output protection function and a control method thereof. The control method comprises: mainly setting more than one preposed protection value prior to a preset overcurrent protection value; determining whether other unusual conditions occur to the power supply when the output current of the power supply exceeds the preposed protection value but does not reach the overcurrent protection value; If not, returning back to the initial step; if yes, stopping the power supply outputting in an automatic recovery manner; and starting an overcurrent protection function if the output current of the power supply further exceeds the overcurrent protection value. Proper overcurrent protection can be provided for the output of the power supply by using the above multiple monitoring techniques. Power supply establishing cost at a load end can be decreased because the specification of the power supply is not required to be enhanced.
Description
Technical field
The present invention relates to a kind of power supply unit and control method thereof, particularly relating to a kind of suitably specification provides the correlation technique of power supply unit output overcurrent protection.
Background technology
Be illustrated in figure 4 a kind of existing power supply unit, it comprises a rectification circuit 81, a circuit of power factor correction 82, a transformer 83, an output circuit 84, a power switch 85, a PWM controller 86, a feedback circuit 87 and a microprocessor 88; Wherein:
The input of output circuit 84 is connected with transformer 83 secondary sides, and the output of output circuit 84 is connected with load (as server system); This power switch 85 is connected with the primary side of transformer 83, and driven by PWM controller 86, whether to control output circuit 84 to load supplying; This PWM controller 86 is also connected with the output of output circuit 84 by feedback circuit 87, to obtain output voltage.
This microprocessor 88 has an output electric current measure end Cs1, a warning message output IO1 and an output, its output electric current measure end Cs1 is connected with the output of output circuit 84 by a differential amplifier 89, to obtain output current, the output that is further specifically configured to output circuit 84 has an output resistance Rs1, the two ends of output resistance Rs1 are connected with two inputs of differential amplifier 89 respectively, the output of differential amplifier 89 is connected to the output electric current measure end Cs1 of microprocessor 88, this microprocessor 88 can be obtained by differential amplifier 89 current value of output current then, the warning message output IO1 of microprocessor 88 and output respectively with load, PWM controller 86 connects.
Aforementioned power source supply has output protecting function, generally take by overcurrent protection, as described in front taking off, microprocessor 88 can be obtained output current from the output of output circuit 84 by differential amplifier 89, for example, when output current exceedes rated current to preset proportion (125%), arrive overcurrent protection point, now microprocessor 88 will cut out PWM controller 86, output circuit 84 is stopped load supplying, and simultaneously by warning message output IO1 notification payload, the electric current being extracted by power supply unit when load is lower than overcurrent protection point, power supply unit just can be restarted and supply power supply.
Although above-mentioned technology can reach overcurrent protection; but must be very careful in the time of design alternative overcurrent protection point for the manufacturer of power supply unit; because overcurrent protection point designs too high; to cause the probability that power supply unit damages and load system damages to improve, the too low effect that cannot bring into play protection power source supply and load system of overcurrent protection point.
In addition; output current when power supply unit start is larger; easily approach even higher than overcurrent protection point; but normality can not exceed overcurrent protection point while use; but to affect power supply stable for false touch overcurrent protection when avoiding starting shooting; when user chooses power supply unit, must yield to the curent change in when start and use the power supply unit of higher-wattage; it means that adopting the power supply unit of high gauge is only the short time demand while tackling start; lack scope for their abilities after steady state operation, but build the cost of power supply by improving servo system.
Summary of the invention
Therefore main purpose of the present invention is providing a kind of power supply unit and control method thereof with output protection; it can set suitable overcurrent protection point to power supply unit; and before overcurrent protection point, establish preposition protection point; outside effective execution output protection; because using the power supply unit of higher-wattage, build cost therefore can reduce the power supply of load end.
As the technical way of reaching aforementioned object and taking, make the aforementioned power supply unit control method with output protection, be mainly and make a power supply unit carry out following steps:
One overcurrent protection value is provided;
Set a preposition protection value that is less than above aforementioned overcurrent protection value;
Obtain output current, and judge whether output current is more than or equal to preposition protection value;
If output current is greater than preposition protection value and is less than overcurrent protection value, further carry out a temperature anomaly discriminating program, if temperature anomaly is stopped power supply, nothing is extremely got back to and is obtained output current step;
If output current is more than or equal to overcurrent protection value, carry out overcurrent protection;
Preceding method is mainly before overcurrent protection value, to set more than one preposition protection value, be greater than preposition protection value at output current value, but be less than under the condition of overcurrent protection value and carry out preposition detection, it further judges whether power supply unit occurs other anomaly (for example overheated), if there is anomaly, temporarily stop power supply; When output current is further greater than overcurrent protection value; side enters overcurrent protection determining program; utilize above-mentioned technology to provide preposition detection to the overcurrent protection point of power supply unit; to tackle some very state property and of short duration electric current rising situations; not only can guarantee whereby the safety of power supply unit; and overcurrent protection point can be drawn high to suitable value, be made power supply unit not only can bear the larger electric current while start, but need not choose the power supply unit of higher-wattage.
As the another technical way of reaching aforementioned object and taking, aforementioned power source supply is comprised:
One rectification circuit, has an ac power input end and a DC power output end;
One circuit of power factor correction, has an input and an output, and its input is connected with the DC power output end of rectification circuit;
One transformer, its primary side is connected with the output of circuit of power factor correction;
One output circuit, has an input and an output, and its input is connected with the secondary side of transformer;
One power switch, is connected with the primary side of transformer;
One PWM controller, has more than one back coupling input and a pulse-width modulation signal output part, and its pulse-width modulation signal output part connects the also keying of power ratio control switch;
One microprocessor, has an output electric current measure end, a warning message output, a temperature signal input, a lock bolt signal input part and an output; Its output is connected with the activation forbidden energy end of PWM controller; This microprocessor a default overcurrent protection value;
One current detector, has an input and an output, and its input is connected with the output of output circuit, and the output of current detector is connected with the output electric current measure end of microprocessor;
One preposition testing circuit, has a current signal input and a lock bolt signal output part, and its current signal input is connected with the output of current detector, and its lock bolt signal output part is connected with the lock bolt signal input part of microprocessor; This preposition testing circuit provides one be less than but approach the preposition protection value of overcurrent protection value, and in the time that the output current of output circuit arrives this preposition protection value, sends a warning message to microprocessor by preposition testing circuit;
One Temperature Detector, is located on the temperature signal input of microprocessor;
Above-mentioned power supply unit mainly coordinates preposition testing circuit that output protection is provided by microprocessor, the default overcurrent protection value of this microprocessor and more than one preposition protection value, and obtained the output current of power supply unit by current detector, in the time that output current is greater than preposition protection value but is less than overcurrent protection value, further detected the temperature regime of power supply unit by Temperature Detector, if while having excess Temperature situation, by microprocessor sending control signal to PWM controller, started high temperature protection (OTP), make PWM controller temporary close, output circuit is then no longer to load supplying, if output current is not only greater than preposition protection value and approaches overcurrent protection value, will be detected by preposition testing circuit, and notify microprocessor, microprocessor will cut out PWM controller, and notification payload, to reduce and extract after electric current by load, the beginning can reset to restore electricity with manual mode.For instance, if overcurrent protection value is output current exceed set point 150%, preposition protection value can be made as 130%, when output current is greater than 130%, but be less than 150%, microprocessor further judges that whether temperature is abnormal, to determine whether to start high temperature protection, if temperature is not abnormal, represent that it may be of short duration abnormal situation that output current improves, for example, electric current while start raises, once start shooting, it is normal that output current can recover, and except output current raises, can not cause other anomaly (for example rising sharply because overload makes temperature), utilize preposition testing mechanism of the present invention, can be got rid of beyond overcurrent protection, until cause output current further to raise while really transshipping, just enter overcurrent protection program, utilize above-mentioned technology, can make power supply unit manufacturer suitable heighten overcurrent protection value, to avoid false touch overcurrent protection when the start, but still can effectively reach the object of output protection.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of a preferred embodiment of the present invention;
Fig. 2 is method flow diagram of the present invention;
Fig. 3 is the circuit block diagram of the another preferred embodiment of the present invention;
Fig. 4 is the circuit block diagram of existing power supply supply.
Reference numeral
10: microprocessor 11: rectification circuit
12: circuit of power factor correction 13: transformer
14: output circuit 15: power switch
16: PWM controller 17: current detector
18: Temperature Detector 20: preposition testing circuit
21: comparator 22: lock bolt circuit
23: inverter 81: rectification circuit
82: circuit of power factor correction 83: transformer
84: output circuit 85: power switch
86: PWM controller 87: feedback circuit
88: microprocessor 89: differential amplifier
Embodiment
About a preferred embodiment of power supply unit of the present invention, refer to shown in Fig. 1, mainly formed by a rectification circuit 11, a circuit of power factor correction 12, a transformer 13, an output circuit 14, a power switch 15, a PWM controller 16, a microprocessor 10, a current detector 17 etc.; Wherein:
This rectification circuit 11 has an ac power input end AC in and a DC power output end; This circuit of power factor correction 12 has an input and an output, and its input is connected with the DC power output end of rectification circuit 11; The primary side of this transformer 13 is connected with the output of circuit of power factor correction 12; This output circuit 14 has an input and an output, and its input is connected with the secondary side of transformer 13; This power switch 15 can be a power transistor, and it is connected with the primary side of transformer 13, and controls its switch by PWM controller 16;
This PWM controller 16 has a back coupling input Vs, an activation forbidden energy end (ENABLE/DISABLE) and a pulse-width modulation signal output part, and its pulse-width modulation signal output part is connected with power switch 15; This microprocessor 10 has an output electric current measure end Cs1, a warning message output IO1 and an output, and its output is connected with the activation forbidden energy end (ENABLE/DISABLE) of PWM controller 16, in order to the use of switch PWM controller 16; Its warning message output IO1 uses with the mainboard of a load and is connected, so as in PWM controller 16 by the mainboard of notification payload before closing; In the present embodiment, microprocessor 10 further comprises a temperature signal input Ts1, a lock bolt signal input part, its temperature signal input Ts1 is connected with a Temperature Detector 18, its lock bolt signal input part is connected with current detector 17, the output resistance Rs1 that this current detector 17 is mainly located on output circuit 14 outputs by a differential amplifier and forms, two inputs of differential amplifier are connected with the two ends of output resistance Rs1, to obtain output current, the output of differential amplifier is connected with the output electric current measure end Cs1 of microprocessor 10.
Power supply unit of the present invention is further provided with a preposition testing circuit 20 again, in the present embodiment, this preposition testing circuit 20 is mainly made up of a comparator 21 and a lock bolt (Latch) circuit 22, comparator 21 has a current signal input and an output, its current signal input is connected with the output of current detector 17, lock bolt circuit 22 has an input and a lock bolt signal output part again, its input is connected with the output of comparator 21, and its lock bolt signal output part is connected with the lock bolt signal input part of microprocessor 10.Aforementioned comparator 21 is in order to set the early warning value of a convergence overcurrent protection value; so that in the time that output current approaches overcurrent protection value; send a lock bolt signal to microprocessor 10 by lock bolt circuit 22; make microprocessor 10 send the mainboard of a warning message to load, and close PWM controller 16 to stop load supplying.
About the further working method of above-mentioned power supply unit in detail as described below:
Refer to shown in Fig. 2 about the feasible workflow of microprocessor 10 1, mainly detect the current value (being output current) (step 201) of output circuit 14 outputs by current detector 17;
Then judge whether output current is more than or equal to 110%(step 202), if be not more than or equal to 110%, represent that output current, below 110%, does not start any safeguard measure in this stage;
If output current is more than or equal to 110%, further judge whether to be more than or equal to 130%(step 203), when output current is more than or equal to 110%, but while not being more than or equal to 130%, enter one second temperature anomaly discriminating program (step 204), to determine whether carried out high temperature protection (OTP); In the present embodiment, this second temperature anomaly discriminating program (step 204) comprising:
Judge that whether temperature is more than or equal to a warning value (step 204A), gets back to initial step if do not exceed warning value; Load is sent to a warning message (step 204B) if exceed warning value; now do not close PWM controller 16; and further judge whether temperature is more than or equal to one and crosses high temperature protection value (step 204C); get back to initial step (step 201) if be not more than or equal to; if exceeded high temperature protection value, started high temperature protection (OTP) (step 204D).Described high temperature protection (OTP) is excessively by microprocessor 10 temporary close PWM controller 16, and suspends load supplying; But decline when the temperature of power supply unit, microprocessor 10 will make PWM controller 16 resume work; In other words, crossing high temperature protection (OTP) is, after power supply unit temperature is recovered normally, can automatically recover the protection mechanism of normal work.
In abovementioned steps 203, if output current is more than or equal to 130%, further judge whether output current is more than or equal to 150%(step 205), if be more than or equal to 150%, directly start overcurrent protection (OCP), alleged overcurrent protection (OCP) is closed PWM controller 16 and stopped load supplying by microprocessor 10; Although equally stop power supply, high temperature protection (OTP) is different from crossing: overcurrent protection can not recovered automatically, must reset with manual mode, to guarantee safety.
And in abovementioned steps 205, if output current is not more than or equal to 150%, further judge whether output current arrives early warning value (148%) (step 206), when output current is more than or equal to 148%, enter the 3rd temperature anomaly discriminating program (step 207), the 3rd temperature anomaly discriminating program (step 207) comprising:
Judge whether temperature exceedes a warning value (step 207A), reset after preposition protective circuit and get back to initial step 201 by microprocessor 10 if do not exceed warning value; Load is sent to a warning message (step 207B) if exceed warning value; now do not close PWM controller 16; and further judge whether temperature exceedes one and cross high temperature protection value (step 207C); get back to initial step 201 if do not exceed; if exceeded high temperature protection value, started high temperature protection (OTP) (step 207D).
And in abovementioned steps (206), if output current is not more than or equal to 148%, enter the first temperature anomaly discriminating program (208), this first temperature anomaly discriminating program (208) comprising:
Judge whether temperature exceedes a warning value (step 208A), if do not exceed warning value, further judges whether to continue for some time (for example 15ms) (step 208E), gets back to initial step 201 if do not continue; Start overcurrent protection if exceed a period of time; In abovementioned steps 208A; load is sent to a warning message (step 208B) if exceed warning value; but do not close PWM controller 16; and further judging whether temperature exceedes one and cross high temperature protection value (step 208C); get back to initial step 201 if do not exceed; if exceeded high temperature protection value, started high temperature protection (OTP) (step 208D).
Can understand the overall structure of power supply unit of the present invention and the workflow that microprocessor 10 is carried out thereof by above-mentioned explanation, mainly the output current of power supply unit is carried out to multistage monitoring, before output current is greater than overcurrent protection value really, carry out respectively different monitoring and protections for the ratio that exceedes that output current is different, so under situation, not only can reach the object of output protection, and can effectively get rid of temporary electric current rising situation (for example, while start), can be beneficial to whereby more than overcurrent protection point brought up to when start output current amplitude that may raise by power supply unit manufacturer, for user, need not buy the power supply unit of high gauge, therefore can reduce the cost that builds of system power supply.
As shown in Figure 3; for the another preferred embodiment of power supply unit of the present invention; its basic framework and last embodiment are roughly the same; difference be in: the lock bolt signal output part of this preposition protective circuit 20 is connected to outside the lock bolt signal input part of microprocessor 10, is also connected directly to the warning message output of microprocessor 10 via an inverter 23.Because the warning message output of microprocessor 10 is to be connected to load mainboard; once it means that preposition protective circuit 20 confirms that output current has reached the early warning value of convergence overcurrent protection value; will be without microprocessor 10 direct notification payload mainboard, strive for whereby time of load mainboard reaction.
Claims (10)
1. a power supply unit control method with output protection, is characterized in that, mainly makes a power supply unit carry out following steps:
One overcurrent protection value is provided;
Set a preposition protection value that is less than above aforementioned overcurrent protection value;
Obtain output current, and judge whether output current is more than or equal to preposition protection value;
If output current is greater than preposition protection value and is less than overcurrent protection value, further carry out a temperature anomaly discriminating program, if temperature anomaly is stopped power supply, nothing is extremely got back to and is obtained output current step;
If output current is more than or equal to overcurrent protection value, carry out overcurrent protection.
2. the power supply unit control method with output protection according to claim 1; it is characterized in that; if output current is not more than or equal to overcurrent protection value; further judge whether output current arrives early warning value; when output current is more than or equal to early warning value; enter one the 3rd temperature anomaly discriminating program, the 3rd temperature anomaly discriminating program comprises:
Judge whether temperature exceedes a warning value, get back to and obtain output current step if do not exceed warning value; Load is sent to a warning message if exceed warning value, now do not stop power supply, and further judge whether temperature exceedes one and cross high temperature protection value, gets back to and obtains output current step if do not exceed, if exceeded high temperature protection value, starts high temperature protection.
3. the power supply unit control method with output protection according to claim 2, is characterized in that, if output current is not more than or equal to early warning value, enters one first temperature anomaly discriminating program, and this first temperature anomaly discriminating program comprises:
Judge whether temperature exceedes a warning value, if do not exceed warning value, further judge whether to continue for some time, get back to and obtain output current step if do not continue; Start overcurrent protection if exceed a period of time.
4. the power supply unit control method with output protection according to claim 3; it is characterized in that; in the 3rd temperature anomaly discriminating program; if exceeding warning value, temperature load is sent to a warning message; but do not stop power supply, and further judging whether temperature exceedes one and cross high temperature protection value, gets back to and obtains output current step if do not exceed; if exceeded high temperature protection value, started high temperature protection.
According to claim 1 to the power supply unit control method with output protection described in any one in claim 4; it is characterized in that; before judging whether output current is more than or equal to preposition protection value; first judge whether to be more than or equal to a protection threshold value; when output current is not more than or equal to protection threshold value, not starting protection.
6. the power supply unit control method with output protection according to claim 5; it is characterized in that, if output current is more than or equal to protection threshold value, but while not being more than or equal to preposition protection value; enter one second temperature anomaly discriminating program, this second temperature anomaly discriminating program comprises:
Judge whether temperature is more than or equal to a warning value, get back to and obtain output current step if do not exceed warning value; Load is sent to a warning message if exceed warning value, and further judge whether temperature is more than or equal to one and crosses high temperature protection value, gets back to and obtains output current step if be not more than or equal to, if exceeded high temperature protection value, starts high temperature protection.
7. a power supply unit with output protection, is characterized in that, comprising:
One rectification circuit, has an ac power input end and a DC power output end;
One circuit of power factor correction, has an input and an output, and its input is connected with the DC power output end of rectification circuit;
One transformer, its primary side is connected with the output of circuit of power factor correction;
One output circuit, has an input and an output, and its input is connected with the secondary side of transformer;
One power switch, is connected with the primary side of transformer;
One PWM controller, has more than one back coupling input and a pulse-width modulation signal output part, and its pulse-width modulation signal output part connects the also keying of power ratio control switch;
One microprocessor, has an output electric current measure end, a warning message output, a temperature signal input, a lock bolt signal input part and an output; Its output is connected with the activation forbidden energy end of PWM controller; This microprocessor a default overcurrent protection value;
One current detector, has an input and an output, and its input is connected with the output of output circuit, and the output of current detector is connected with the output electric current measure end of microprocessor;
One preposition testing circuit, has a current signal input and a lock bolt signal output part, and its current signal input is connected with the output of current detector, and its lock bolt signal output part is connected with the lock bolt signal input part of microprocessor; This preposition testing circuit provides one be less than but approach the preposition protection value of overcurrent protection value, and in the time that the output current of output circuit arrives this preposition protection value, sends a warning message to microprocessor by preposition testing circuit;
One Temperature Detector, is located on the temperature signal input of microprocessor.
8. the power supply unit with output protection according to claim 7, it is characterized in that, this preposition testing circuit is mainly made up of a comparator and a lock bolt circuit, comparator has a current signal input and an output, and its current signal input is connected with the output of current detector;
This lock bolt circuit has an input and a lock bolt signal output part, and its input is connected with the output of comparator, and its lock bolt signal output part is connected with the lock bolt signal input part of microprocessor.
9. according to the power supply unit with output protection described in claim 7 or 8, it is characterized in that, the lock bolt signal output part of this preposition testing circuit is connected with the warning message output of microprocessor.
10. the power supply unit with output protection according to claim 9, is characterized in that, the lock bolt signal output part of this preposition testing circuit is connected with the warning message output of microprocessor by an inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210425374.9A CN103795277B (en) | 2012-10-30 | 2012-10-30 | There is power supply unit and the control method thereof of output protecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210425374.9A CN103795277B (en) | 2012-10-30 | 2012-10-30 | There is power supply unit and the control method thereof of output protecting function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103795277A true CN103795277A (en) | 2014-05-14 |
| CN103795277B CN103795277B (en) | 2016-05-04 |
Family
ID=50670671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210425374.9A Active CN103795277B (en) | 2012-10-30 | 2012-10-30 | There is power supply unit and the control method thereof of output protecting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103795277B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106134047A (en) * | 2014-09-29 | 2016-11-16 | 富士电机株式会社 | Semiconductor device |
| CN106160484A (en) * | 2015-04-13 | 2016-11-23 | 康舒科技股份有限公司 | The power supply circuit of tool low output voltage defencive function |
| CN108075445A (en) * | 2016-11-14 | 2018-05-25 | 伟诠电子股份有限公司 | The control gauge device and correlation technique of power supply unit |
| CN109756132A (en) * | 2019-01-28 | 2019-05-14 | 安徽智训机器人技术有限公司 | Web advertisement media system |
| CN112332378A (en) * | 2019-08-05 | 2021-02-05 | 无锡旭康微电子有限公司 | Priority judging circuit, control system and control method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1473592A (en) * | 1973-09-26 | 1977-05-18 | Western Electric Co | Converter circuits |
| JPH06276734A (en) * | 1993-03-15 | 1994-09-30 | Fujitsu Denso Ltd | Overcurrent protective circuit |
| CN1472877A (en) * | 2002-07-04 | 2004-02-04 | ������������ʽ���� | Inverter circuit device with temperature testing circuit |
| CN201118460Y (en) * | 2007-10-31 | 2008-09-17 | 艾纯 | A reverse power supply |
| CN101557092A (en) * | 2009-05-22 | 2009-10-14 | 杭州华三通信技术有限公司 | Protection circuit and circuit protection method |
| CN101662223A (en) * | 2009-09-24 | 2010-03-03 | 上海导向微电子有限公司 | System and method for compensating maximum output power of switching power supply |
| CN102377233A (en) * | 2010-08-04 | 2012-03-14 | 康舒科技股份有限公司 | Power supply device capable of automatically switching standby power supply path |
| WO2012039200A1 (en) * | 2010-09-21 | 2012-03-29 | 矢崎総業株式会社 | Load drive device |
-
2012
- 2012-10-30 CN CN201210425374.9A patent/CN103795277B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1473592A (en) * | 1973-09-26 | 1977-05-18 | Western Electric Co | Converter circuits |
| JPH06276734A (en) * | 1993-03-15 | 1994-09-30 | Fujitsu Denso Ltd | Overcurrent protective circuit |
| CN1472877A (en) * | 2002-07-04 | 2004-02-04 | ������������ʽ���� | Inverter circuit device with temperature testing circuit |
| CN201118460Y (en) * | 2007-10-31 | 2008-09-17 | 艾纯 | A reverse power supply |
| CN101557092A (en) * | 2009-05-22 | 2009-10-14 | 杭州华三通信技术有限公司 | Protection circuit and circuit protection method |
| CN101662223A (en) * | 2009-09-24 | 2010-03-03 | 上海导向微电子有限公司 | System and method for compensating maximum output power of switching power supply |
| CN102377233A (en) * | 2010-08-04 | 2012-03-14 | 康舒科技股份有限公司 | Power supply device capable of automatically switching standby power supply path |
| WO2012039200A1 (en) * | 2010-09-21 | 2012-03-29 | 矢崎総業株式会社 | Load drive device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106134047A (en) * | 2014-09-29 | 2016-11-16 | 富士电机株式会社 | Semiconductor device |
| CN106134047B (en) * | 2014-09-29 | 2018-10-16 | 富士电机株式会社 | Semiconductor device |
| CN106160484A (en) * | 2015-04-13 | 2016-11-23 | 康舒科技股份有限公司 | The power supply circuit of tool low output voltage defencive function |
| CN106160484B (en) * | 2015-04-13 | 2018-07-27 | 康舒科技股份有限公司 | Has the power supply circuit of low output voltage defencive function |
| CN108075445A (en) * | 2016-11-14 | 2018-05-25 | 伟诠电子股份有限公司 | The control gauge device and correlation technique of power supply unit |
| CN108075445B (en) * | 2016-11-14 | 2019-06-28 | 伟诠电子股份有限公司 | The control gauge device and correlation technique of power supply unit |
| CN109756132A (en) * | 2019-01-28 | 2019-05-14 | 安徽智训机器人技术有限公司 | Web advertisement media system |
| CN112332378A (en) * | 2019-08-05 | 2021-02-05 | 无锡旭康微电子有限公司 | Priority judging circuit, control system and control method |
| CN112332378B (en) * | 2019-08-05 | 2023-01-24 | 无锡旭康微电子有限公司 | Priority judging circuit, control system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103795277B (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI500228B (en) | Power supply with output protection function and control method thereof | |
| CN103795277A (en) | Power supply with output protection function and control method thereof | |
| CN102005777B (en) | Control method and control system for photovoltaic grid-connected inverter | |
| CN202034894U (en) | IGBT trigger device with redundancy function | |
| CN105207172A (en) | Water outlet power failure intelligent electric leakage protector and control method thereof | |
| CN104377685B (en) | The redundant power supply circuit that a kind of electric machine controller for motor vehicle reverse connection preventing pours in down a chimney | |
| US9847634B2 (en) | Providing protection against arc-flash in a genset | |
| CN106856321A (en) | Bathing safety control system and bathing safety control method | |
| CN107255268A (en) | A kind of primary air fan RB control methods based on primary air fan system state monitoring | |
| CN104158152B (en) | A kind of motor driver protection circuit and means of defence | |
| JP2016157364A (en) | Power control unit and control method thereof | |
| CN104009457A (en) | Air conditioner compressor protection and control method and device | |
| CN203415956U (en) | Frequency converter system protection device | |
| CN106602517A (en) | Voltage stabilizer self-protective method | |
| CN203984296U (en) | The control circuit with oil pump defencive function | |
| CN106058802B (en) | Anti-failure circuit chip and anti-failure anti-leakage protector | |
| CN202734255U (en) | Electric heating function control device for heat-pump water heater | |
| CN203260995U (en) | Single-phase safety electricity-using appliance | |
| CN202268715U (en) | Charging device possessing overcharge detection protection function | |
| CN103574907B (en) | For control device and the control method thereof of the electric heating function of Teat pump boiler | |
| CN206323120U (en) | High-power quick electric fire current-limiting protector | |
| CN105006959B (en) | Inverter slow starting control circuit and control method | |
| CN110190668B (en) | Hot standby speed regulation power supply system | |
| CN108023407A (en) | A kind of intelligence circuit breaking protective system | |
| CN103063972A (en) | Photovoltaic grid-connected inverter direct current reverse-connection prevention detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |